Another resource I just located

USA Football has four videos on their website about safety precautions including:

1. Concussion (TBI) awareness
2. Heat Illness Prevention
3. Helmet Fitting
4. Shoulder Pad Fitting

These are a must see for any first time youth football coaches to obtain a better understanding of the risks associated with playing football.

"Preseason Heat Acclimatization Guidelines for Secondary School Athletics"

A series of videos produced by the National Athletic Trainer's Association that discuss interventions to prevent heat illness in secondary schools.